#include "CH58x_common.h"
#include "GXHTC3.h"
#include "app_i2c.h"

static const uint8_t crc_table[] =
		{
				0x00, 0x31, 0x62, 0x53, 0xc4, 0xf5, 0xa6, 0x97, 0xb9, 0x88, 0xdb, 0xea, 0x7d, 0x4c, 0x1f, 0x2e,
				0x43, 0x72, 0x21, 0x10, 0x87, 0xb6, 0xe5, 0xd4, 0xfa, 0xcb, 0x98, 0xa9, 0x3e, 0x0f, 0x5c, 0x6d,
				0x86, 0xb7, 0xe4, 0xd5, 0x42, 0x73, 0x20, 0x11, 0x3f, 0x0e, 0x5d, 0x6c, 0xfb, 0xca, 0x99, 0xa8,
				0xc5, 0xf4, 0xa7, 0x96, 0x01, 0x30, 0x63, 0x52, 0x7c, 0x4d, 0x1e, 0x2f, 0xb8, 0x89, 0xda, 0xeb,
				0x3d, 0x0c, 0x5f, 0x6e, 0xf9, 0xc8, 0x9b, 0xaa, 0x84, 0xb5, 0xe6, 0xd7, 0x40, 0x71, 0x22, 0x13,
				0x7e, 0x4f, 0x1c, 0x2d, 0xba, 0x8b, 0xd8, 0xe9, 0xc7, 0xf6, 0xa5, 0x94, 0x03, 0x32, 0x61, 0x50,
				0xbb, 0x8a, 0xd9, 0xe8, 0x7f, 0x4e, 0x1d, 0x2c, 0x02, 0x33, 0x60, 0x51, 0xc6, 0xf7, 0xa4, 0x95,
				0xf8, 0xc9, 0x9a, 0xab, 0x3c, 0x0d, 0x5e, 0x6f, 0x41, 0x70, 0x23, 0x12, 0x85, 0xb4, 0xe7, 0xd6,
				0x7a, 0x4b, 0x18, 0x29, 0xbe, 0x8f, 0xdc, 0xed, 0xc3, 0xf2, 0xa1, 0x90, 0x07, 0x36, 0x65, 0x54,
				0x39, 0x08, 0x5b, 0x6a, 0xfd, 0xcc, 0x9f, 0xae, 0x80, 0xb1, 0xe2, 0xd3, 0x44, 0x75, 0x26, 0x17,
				0xfc, 0xcd, 0x9e, 0xaf, 0x38, 0x09, 0x5a, 0x6b, 0x45, 0x74, 0x27, 0x16, 0x81, 0xb0, 0xe3, 0xd2,
				0xbf, 0x8e, 0xdd, 0xec, 0x7b, 0x4a, 0x19, 0x28, 0x06, 0x37, 0x64, 0x55, 0xc2, 0xf3, 0xa0, 0x91,
				0x47, 0x76, 0x25, 0x14, 0x83, 0xb2, 0xe1, 0xd0, 0xfe, 0xcf, 0x9c, 0xad, 0x3a, 0x0b, 0x58, 0x69,
				0x04, 0x35, 0x66, 0x57, 0xc0, 0xf1, 0xa2, 0x93, 0xbd, 0x8c, 0xdf, 0xee, 0x79, 0x48, 0x1b, 0x2a,
				0xc1, 0xf0, 0xa3, 0x92, 0x05, 0x34, 0x67, 0x56, 0x78, 0x49, 0x1a, 0x2b, 0xbc, 0x8d, 0xde, 0xef,
				0x82, 0xb3, 0xe0, 0xd1, 0x46, 0x77, 0x24, 0x15, 0x3b, 0x0a, 0x59, 0x68, 0xff, 0xce, 0x9d, 0xac
		};

unsigned char cal_crc_table(unsigned char *ptr, unsigned char len);
int user_i2c_write(uint8_t addr_7bit, const uint8_t *data, uint8_t length);
int user_i2c_read(uint8_t addr_7bit, uint8_t *data, uint8_t length);

unsigned char cal_crc_table(unsigned char *ptr, unsigned char len)
{
	unsigned char crc = 0xFF;

	while (len--)
	{
		crc = crc_table[crc ^ *ptr++];
	}
	return (crc);
}

int user_i2c_write(uint8_t addr_7bit, const uint8_t *data, uint8_t length) {

	return i2c_write_to(addr_7bit, data, length, false, true);

}

int user_i2c_read(uint8_t addr_7bit, uint8_t *data, uint8_t length) {

	return i2c_read_from(addr_7bit, data, length, true, 1);

}

void GXHTC3_init() {
	i2c_app_init(0xff);
	GXHTC3_rst();
}

void GXHTC3_takeMeasure() {
	uint8_t takeMeasure1[2] = { 0x35, 0x17 };
	user_i2c_write(GXHTC3_ADDR, takeMeasure1, 2);
	DelayMs(1);
	uint8_t takeMeasure2[2] = { 0x60, 0x9c };
	user_i2c_write(GXHTC3_ADDR, takeMeasure2, 2);
}

void GXHTC3_rst() {
	uint8_t takeMeasure[2] = { 0xb0, 0x98 };
	user_i2c_write(GXHTC3_ADDR, takeMeasure, 2);
}

temp_RESULT GXHTC3_readMeas() {
	temp_RESULT temp_result;
	uint8_t temp_raw[6];
	user_i2c_read(GXHTC3_ADDR, temp_raw, 6);

	if (cal_crc_table(temp_raw, 2) == temp_raw[2])
			{
		temp_result.status = 1;
		temp_result.temperature = ((float) (temp_raw[0] << 8 | temp_raw[1]) * 0.267032 - 4500) / 100;
		temp_result.humidity = (float) (temp_raw[3] << 8 | temp_raw[4]) * 0.15259 / 100;

	}
	else {
		temp_result.status = 0;
	}
	DelayMs(1);
	uint8_t takeMeasure1[2] = { 0xb0, 0x98 };
	user_i2c_write(GXHTC3_ADDR, takeMeasure1, 2);
	return temp_result;
}
